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Stiles Reservoir Dam Reconstruction
Leicester, MA

Pare Corporation developed a rehabilitation program to bring the 150-year-old Stiles Reservoir Dam into compliance with current dam safety regulations. This required completing a full-depth excavation of the 40-foot high dam to replace the outlet, installing a sheet pile cutoff wall, adding blanket and toe drains for an internal drainage system, and raising the top of the dam by constructing a two-foot high concrete parapet wall along its crest.  In addition to correcting the significant seepage and leakage issues through the embankment, the design allowed for an increase of about 14% in the impoundment capacity for the lake to raise the maximum
water surface elevation.

Sustainable design was emphasized by using readily-available local materials and the reuse of onsite materials reduced trucking requirements.  The design also uses natural stone in place of concrete within the stilling basin.